The knee push sides may be the most common type available. Another common type is the foot bar. You balance on one foot and push the bar down with the other to lower the side. There is the double trigger drop mechanism. There are levers on both ends of the crib and you need both hands free to use them. You squeeze the triggers and then the side will drop. The problem with this type is that if you have the baby in your arms it will be next to impossible to operate.
The wheels on a crib are a great asset because it makes the crib easier to move to clean under or retrieve dropped toys as well as changing bedding. Make sure the casters are strong and turn easily. If you don’t think you will need them you can put them aside in case you change your mind.
There are adjustable mattress heights available on all cribs with the exception of the cheapest models of cribs. The three position option is available and is the wisest choice. Two height position are acceptable. Single height mattress is not a safe choice because as your child grows the mattress should be lowered to prevent him from climbing out of the crib or toppling out of the crib.
You should look at the mattress supports as well. Some have vinyl straps that could wear out and break others have metal bar supports which is a better option. The best option however is a metal spring system where the entire mattress is supported and is the most durable of the three options.
About The Author
Martin Smith is a successful freelance writer providing advice for consumers on purchasing a variety of baby cribs, His numerous articles provide a wonderfully researched resource of interesting and relevant information. http://www.1st-babies.com.